// For viewing skin map on input source.
void vp9_output_skin_map(VP9_COMP *const cpi, FILE *yuv_skinmap_file) {
int i, j, mi_row, mi_col, num_bl;
VP9_COMMON *const cm = &cpi->common;
uint8_t *y;
const uint8_t *src_y = cpi->Source->y_buffer;
const int src_ystride = cpi->Source->y_stride;
const int y_bsize = 16; // Use 8x8 or 16x16.
const int shy = (y_bsize == 8) ? 3 : 4;
const int fac = y_bsize / 8;
YV12_BUFFER_CONFIG skinmap;
memset(&skinmap, 0, sizeof(YV12_BUFFER_CONFIG));
if (vpx_alloc_frame_buffer(&skinmap, cm->width, cm->height, cm->subsampling_x,
cm->subsampling_y, VP9_ENC_BORDER_IN_PIXELS,
cm->byte_alignment)) {
vpx_free_frame_buffer(&skinmap);
return;
}
memset(skinmap.buffer_alloc, 128, skinmap.frame_size);
y = skinmap.y_buffer;
// Loop through blocks and set skin map based on center pixel of block.
// Set y to white for skin block, otherwise set to source with gray scale.
// Ignore rightmost/bottom boundary blocks.
for (mi_row = 0; mi_row < cm->mi_rows - 1; mi_row += fac) {
num_bl = 0;
for (mi_col = 0; mi_col < cm->mi_cols - 1; mi_col += fac) {
const int block_index = mi_row * cm->mi_cols + mi_col;
const int is_skin = cpi->skin_map[block_index];
for (i = 0; i < y_bsize; i++) {
for (j = 0; j < y_bsize; j++) {
y[i * src_ystride + j] = is_skin ? 255 : src_y[i * src_ystride + j];
}
}
num_bl++;
y += y_bsize;
src_y += y_bsize;
}
y += (src_ystride << shy) - (num_bl << shy);
src_y += (src_ystride << shy) - (num_bl << shy);
}
vpx_write_yuv_frame(yuv_skinmap_file, &skinmap);
vpx_free_frame_buffer(&skinmap);
}
struct lookahead_ctx *vp10_lookahead_init(unsigned int width,
unsigned int height,
unsigned int subsampling_x,
unsigned int subsampling_y,
#if CONFIG_VPX_HIGHBITDEPTH
int use_highbitdepth,
#endif
unsigned int depth) {
struct lookahead_ctx *ctx = NULL;
// Clamp the lookahead queue depth
depth = clamp(depth, 1, MAX_LAG_BUFFERS);
// Allocate memory to keep previous source frames available.
depth += MAX_PRE_FRAMES;
// Allocate the lookahead structures
ctx = calloc(1, sizeof(*ctx));
if (ctx) {
const int legacy_byte_alignment = 0;
unsigned int i;
ctx->max_sz = depth;
ctx->buf = calloc(depth, sizeof(*ctx->buf));
if (!ctx->buf) goto bail;
for (i = 0; i < depth; i++)
if (vpx_alloc_frame_buffer(
&ctx->buf[i].img, width, height, subsampling_x, subsampling_y,
#if CONFIG_VPX_HIGHBITDEPTH
use_highbitdepth,
#endif
VPX_ENC_BORDER_IN_PIXELS, legacy_byte_alignment))
goto bail;
}
return ctx;
bail:
vp10_lookahead_destroy(ctx);
return NULL;
}
int vp10_lookahead_push(struct lookahead_ctx *ctx, YV12_BUFFER_CONFIG *src,
int64_t ts_start, int64_t ts_end,
#if CONFIG_VPX_HIGHBITDEPTH
int use_highbitdepth,
#endif
unsigned int flags) {
struct lookahead_entry *buf;
#if USE_PARTIAL_COPY
int row, col, active_end;
int mb_rows = (src->y_height + 15) >> 4;
int mb_cols = (src->y_width + 15) >> 4;
#endif
int width = src->y_crop_width;
int height = src->y_crop_height;
int uv_width = src->uv_crop_width;
int uv_height = src->uv_crop_height;
int subsampling_x = src->subsampling_x;
int subsampling_y = src->subsampling_y;
int larger_dimensions, new_dimensions;
if (ctx->sz + 1 + MAX_PRE_FRAMES > ctx->max_sz) return 1;
ctx->sz++;
buf = pop(ctx, &ctx->write_idx);
new_dimensions = width != buf->img.y_crop_width ||
height != buf->img.y_crop_height ||
uv_width != buf->img.uv_crop_width ||
uv_height != buf->img.uv_crop_height;
larger_dimensions = width > buf->img.y_width || height > buf->img.y_height ||
uv_width > buf->img.uv_width ||
uv_height > buf->img.uv_height;
assert(!larger_dimensions || new_dimensions);
#if USE_PARTIAL_COPY
// TODO(jkoleszar): This is disabled for now, as
// vp10_copy_and_extend_frame_with_rect is not subsampling/alpha aware.
// Only do this partial copy if the following conditions are all met:
// 1. Lookahead queue has has size of 1.
// 2. Active map is provided.
// 3. This is not a key frame, golden nor altref frame.
if (!new_dimensions && ctx->max_sz == 1 && active_map && !flags) {
for (row = 0; row < mb_rows; ++row) {
col = 0;
while (1) {
// Find the first active macroblock in this row.
for (; col < mb_cols; ++col) {
if (active_map[col]) break;
}
// No more active macroblock in this row.
if (col == mb_cols) break;
// Find the end of active region in this row.
active_end = col;
for (; active_end < mb_cols; ++active_end) {
if (!active_map[active_end]) break;
}
// Only copy this active region.
vp10_copy_and_extend_frame_with_rect(src, &buf->img, row << 4, col << 4,
16, (active_end - col) << 4);
// Start again from the end of this active region.
col = active_end;
}
active_map += mb_cols;
}
} else {
#endif
if (larger_dimensions) {
YV12_BUFFER_CONFIG new_img;
memset(&new_img, 0, sizeof(new_img));
if (vpx_alloc_frame_buffer(&new_img, width, height, subsampling_x,
subsampling_y,
#if CONFIG_VPX_HIGHBITDEPTH
use_highbitdepth,
#endif
VPX_ENC_BORDER_IN_PIXELS, 0))
return 1;
vpx_free_frame_buffer(&buf->img);
buf->img = new_img;
} else if (new_dimensions) {
buf->img.y_crop_width = src->y_crop_width;
buf->img.y_crop_height = src->y_crop_height;
buf->img.uv_crop_width = src->uv_crop_width;
buf->img.uv_crop_height = src->uv_crop_height;
buf->img.subsampling_x = src->subsampling_x;
buf->img.subsampling_y = src->subsampling_y;
}
// Partial copy not implemented yet
vp10_copy_and_extend_frame(src, &buf->img);
#if USE_PARTIAL_COPY
}
#endif
buf->ts_start = ts_start;
buf->ts_end = ts_end;
buf->flags = flags;
return 0;
}
// For viewing skin map on input source.
void vp9_compute_skin_map(VP9_COMP *const cpi, FILE *yuv_skinmap_file) {
int i, j, mi_row, mi_col, num_bl;
VP9_COMMON *const cm = &cpi->common;
uint8_t *y;
const uint8_t *src_y = cpi->Source->y_buffer;
const uint8_t *src_u = cpi->Source->u_buffer;
const uint8_t *src_v = cpi->Source->v_buffer;
const int src_ystride = cpi->Source->y_stride;
const int src_uvstride = cpi->Source->uv_stride;
int y_bsize = 16; // Use 8x8 or 16x16.
int uv_bsize = y_bsize >> 1;
int ypos = y_bsize >> 1;
int uvpos = uv_bsize >> 1;
int shy = (y_bsize == 8) ? 3 : 4;
int shuv = shy - 1;
int fac = y_bsize / 8;
// Use center pixel or average of center 2x2 pixels.
int mode_filter = 1;
YV12_BUFFER_CONFIG skinmap;
memset(&skinmap, 0, sizeof(YV12_BUFFER_CONFIG));
if (vpx_alloc_frame_buffer(&skinmap, cm->width, cm->height,
cm->subsampling_x, cm->subsampling_y,
VP9_ENC_BORDER_IN_PIXELS, cm->byte_alignment)) {
vpx_free_frame_buffer(&skinmap);
return;
}
memset(skinmap.buffer_alloc, 128, skinmap.frame_size);
y = skinmap.y_buffer;
// Loop through blocks and set skin map based on center pixel of block.
// Set y to white for skin block, otherwise set to source with gray scale.
// Ignore rightmost/bottom boundary blocks.
for (mi_row = 0; mi_row < cm->mi_rows - 1; mi_row += fac) {
num_bl = 0;
for (mi_col = 0; mi_col < cm->mi_cols - 1; mi_col += fac) {
// Select pixel for each block for skin detection.
// Use center pixel, or 2x2 average at center.
uint8_t ysource = src_y[ypos * src_ystride + ypos];
uint8_t usource = src_u[uvpos * src_uvstride + uvpos];
uint8_t vsource = src_v[uvpos * src_uvstride + uvpos];
uint8_t ysource2 = src_y[(ypos + 1) * src_ystride + ypos];
uint8_t usource2 = src_u[(uvpos + 1) * src_uvstride + uvpos];
uint8_t vsource2 = src_v[(uvpos + 1) * src_uvstride + uvpos];
uint8_t ysource3 = src_y[ypos * src_ystride + (ypos + 1)];
uint8_t usource3 = src_u[uvpos * src_uvstride + (uvpos + 1)];
uint8_t vsource3 = src_v[uvpos * src_uvstride + (uvpos + 1)];
uint8_t ysource4 = src_y[(ypos + 1) * src_ystride + (ypos + 1)];
uint8_t usource4 = src_u[(uvpos + 1) * src_uvstride + (uvpos + 1)];
uint8_t vsource4 = src_v[(uvpos + 1) * src_uvstride + (uvpos + 1)];
int is_skin = 0;
if (mode_filter == 1) {
ysource = (ysource + ysource2 + ysource3 + ysource4) >> 2;
usource = (usource + usource2 + usource3 + usource4) >> 2;
vsource = (vsource + vsource2 + vsource3 + vsource4) >> 2;
}
is_skin = vp9_skin_pixel(ysource, usource, vsource);
for (i = 0; i < y_bsize; i++) {
for (j = 0; j < y_bsize; j++) {
if (is_skin)
y[i * src_ystride + j] = 255;
else
y[i * src_ystride + j] = src_y[i * src_ystride + j];
}
}
num_bl++;
y += y_bsize;
src_y += y_bsize;
src_u += uv_bsize;
src_v += uv_bsize;
}
y += (src_ystride << shy) - (num_bl << shy);
src_y += (src_ystride << shy) - (num_bl << shy);
src_u += (src_uvstride << shuv) - (num_bl << shuv);
src_v += (src_uvstride << shuv) - (num_bl << shuv);
}
